choroid: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “choroid” mean?
The middle, vascular layer of the eye, between the retina and sclera.
Audio
Pronunciation
Definition
Meaning and Definition
The middle, vascular layer of the eye, between the retina and sclera.
Occasionally used in a broader anatomical sense to describe other membranous, vascular layers (e.g., choroid plexus in the brain).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage.
Connotations
Purely technical in both regions.
Frequency
Extremely low frequency in general English, used exclusively in ophthalmology, optometry, and medical contexts.
Grammar
How to Use “choroid” in a Sentence
The [adjective] choroidchoroid of the [noun]Vocabulary
Collocations
Examples
Examples of “choroid” in a Sentence
verb
British English
- (No verbal use)
American English
- (No verbal use)
adverb
British English
- (No adverbial use)
American English
- (No adverbial use)
adjective
British English
- The choroid vessels are numerous.
- Choroid blood supply is crucial.
American English
- The choroid vasculature is dense.
- Choroid melanin absorbs light.
Usage
Meaning in Context
Business
Not used.
Academic
Used in medical, biological, and optometry research papers and textbooks.
Everyday
Virtually never used outside of medical discussions.
Technical
Core term in ophthalmology, anatomy, and related clinical fields.
Vocabulary
Synonyms of “choroid”
Watch out
Common Mistakes When Using “choroid”
- Misspelling as 'chorioid' or 'coroid'.
- Confusing it with the cornea or retina.
- Using it in non-anatomical contexts.
FAQ
Frequently Asked Questions
Rarely. The related term 'choroid plexus' refers to vascular structures in the brain's ventricles that produce cerebrospinal fluid.
It's pronounced KOR-oid, with the stress on the first syllable. The 'ch' is a hard 'k' sound.
Yes. Conditions like choroiditis (inflammation) or choroidal neovascularization (abnormal blood vessel growth) are specific to this layer.
The melanin in the choroid absorbs excess light that passes through the retina, preventing internal reflections and blurring of the visual image.
The middle, vascular layer of the eye, between the retina and sclera.
Choroid is usually technical/scientific in register.
Phrases
Idioms & Phrases
- “(none)”
Learning
Memory Aids
Mnemonic
Think: 'CHORus of vessels in the eye' + '-oid' (meaning 'resembling') → the vascular layer.
Conceptual Metaphor
(Not applicable – purely literal anatomical term)
Practice
Quiz
What is the primary function of the choroid?